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denpristay [2]
3 years ago
10

Which of the following statements is true? A. A producer usually obtains food by hunting other organisms. B. Humans that prepare

their own meals are producers. C. A producer must be a plant. D. Consumers depend upon producers for food.
Chemistry
2 answers:
olganol [36]3 years ago
6 0

Answer:

D. Consumers depend upon producers for food.

Explanation:

Consumers depend on producers for food because they can not make their own energy-rich molecules. They have to eat other organisms to obtain energy.

liberstina [14]3 years ago
4 0

Answer: it is d

Explanation:

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erica [24]

9 grams of hydrogen gas (H2) will SC  Johnson need to react in order to make 1 bottle of Windex.

Explanation:

Balance equation for the formation of ammonia from H2 gas.

N2 + 3H2 ⇒ 2 NH_{3}

Given

mass of ammonia in 1 bottle of windex = 51 gram

atomic mass of ammonia 17.01 gram/mole

number of moles = \frac{mass}{atomic mass of 1 mole}

number of moles = \frac{51}{17.01}

                               = 3 moles of ammonia is formed.

in 1 bottle of windex there are 3 moles of ammonia 0r 51 grams of ammonia.

From the equation it can be found that:

3 moles of hydrogen reacted to form 2 moles of ammonia

so, x moles of hydrogen will react to form 3 moles of ammonia.

\frac{2}{3} = \frac{3}{x}

x = 4.5 moles of hydrogen will be required.

to convert moles into gram formula used:

mass = atomic mass x number of moles  (atomic mass of H2 is 2grams/mole)

        = 2 x 4.5

        = 9 grams of hydrogen.

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2 years ago
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